Dev tools · alternatives · 2026
24 alternatives to SuperMassive – Fast durable, in-memory, distributed key-value database
Hey hn! I hope you're all doing well. I’d like to share a new open-source database I’ve designed and written called SuperMassive. SuperMassive is a scalable, distributed, in-memory key-value database designed from the ground up to allow for high concurrency, fast writes, fault tolerance, and durability while remaining simple to use and efficiently scalable. The idea for SuperMassive comes from its name.. I wanted to build a key-value database that can scale infinitely, remain durable, be self-healing, consistent, and blazing fast. I also wanted to simplify sharding and replication compared…
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1
Hey there HN! We’re Joe and Stopa, and today we’re open sourcing InstantDB, a client-side database that makes it easy to build real-time and collaborative apps like Notion and Figma. Building modern apps these days involves a lot of schleps. For a basic CRUD app you need to spin up servers, wire up endpoints, integrate auth, add permissions, and then marshal data from the backend to the frontend and back again. If you want to deliver a buttery smooth user experience, you’ll need to add optimistic updates and rollbacks. We do these steps over and over for every feature we build, which can…
2024 · github.com · its alternatives →
- 2
Superset▲541Hey HN, we’re Avi, Kiet, and Satya. We’re building Superset, an open-source terminal made for managing a bunch of coding agents (Claude Code, Codex, etc) in parallel. - Superset makes it easy to spin up git worktrees and automatically setup your environment - Agents and terminal tabs are isolated to worktrees, preventing conflicts - Built-in hooks [0] to notify when your coding agents are done/needs attention, - A diff viewer to review the changes and make PRs quickly We’re three engineers who’ve built and maintained large codebases, and kept wanting to work on as many features in…
Feb 2026 · superset.sh · its alternatives →
- 3
A totally proof-of-concept FoundationDB based network block device backend - dividuum/fdb-nbd
2018 · github.com · its alternatives →
- 4
SuperHQ▲95Hey HN, I built SuperHQ, an app that lets you run coding agents in local sandboxes (powered by Shuru). No custom UI wrapping the agents, they run as CLI/TUI like they were designed to. It just provides you the tools most of us (okay, maybe just me?) needed for running multiple coding agents in parallel without worrying about breaking your system or work environment. Each agent runs in its own microVM. You mount your projects in, writes go to a tmpfs overlay so your host is never touched, and you get a unified diff view to accept or discard changes. API keys never enter the sandbox, they…
Apr 2026 · superhq.ai · its alternatives →
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Logical multi-master PostgreSQL replication. Contribute to pgEdge/spock development by creating an account on GitHub.
2025 · github.com · its alternatives →
- 6
Recently created a minimal persistent relational database in Go. Main focus was on implementing & understanding working the of database, storage management & transaction handling. Use of B+ Tree for storage engine(support for indexing), managing a Free List (for reusing nodes), Support for transactions, Concurrent Reads. Still have many things to add & fix like query processing being one of the main & fixing some bugs Repo link - https://github.com/Sahilb315/AtomixDB Would love to hear your thoughts
2025 · github.com · its alternatives →
- 7
Hey everyone! I hope you’re all having a great day. Today I’m sharing an experimental open-source project I’ve been working on for the past few months called Wildcat. Wildcat is an embedded persistent storage engine implementing an lsm tree similar to RocksDB and or LevelDB. The motivation for this system was to try to solve the multi-writer bottlenecks that most embedded systems incur. With that, during my journey with storage systems especially the log structured flavour I’ve implemented a lot of interesting optimizations and algorithms in regards to the write and read paths. I hope you…
2025 · github.com · its alternatives →
- 8
Hi HN, we built SuperHQ, an open source app that runs AI coding agents in isolated microVM sandboxes instead of directly on your machine. Each agent gets its own VM with a full Debian environment. You mount your projects in, writes go to a tmpfs overlay so your host is never touched, and you get a diff view to accept or discard changes. API keys never enter the sandbox. We also just launched remote.superhq.ai which acts as a remote control for SuperHQ, allowing you to access your workspaces and agents from anywhere.
Apr 2026 · github.com · its alternatives →
- 9
For a while now I had the urge to learn how to pick the "right" database for projects, I looked around online at different databases to try to understand their different traits, and was bombarded with marketing instead of actual info on the advantages and drawbacks. The only solution for me was to learn some database internals (I read the wonderful book written by Alex Petrov), and the problems seemed so interesting, I could not fight the urge and went ahead with trying to write my own db. Anyway, ~9 months have passed and I feel like I'm "done", I have learned a ton, and really proud of…
2024 · github.com · its alternatives →
- 10
A strongly-typed document database that runs on any transactional key-value store. - losfair/RefineDB
2021 · github.com · its alternatives →
- 11
The most advanced distribution system of NDB Cluster, by Mikael Ronström the inventor of NDB Cluster; made to work for the most advanced ML applications.
2021 · rondb.com · its alternatives →
- 12IB
upscaledb - a blazingly fast embedded key-value store with analytical functions
2016 · upscaledb.com · its alternatives →
- 13
LBADD: An experimental, distributed SQL database. Contribute to tomarrell/lbadd development by creating an account on GitHub.
2019 · github.com · its alternatives →
- 14
Hyperterse▲86Hi HN, I’m Samrith, creator of Hyperterse. Today I’m launching Hyperterse 2.0, a schema-first framework for building MCP servers directly on top of your existing production databases. If you're building AI agents in production, you’ve probably run into agents needing access to structured, reliable data but wiring your business logic to MCP tools is tedious. Most teams end up writing fragile glue code. Or worse, giving agents unsafe, overbroad access. There isn’t a clean, principled way to expose just the right data surface to agents. Hyperterse lets you define a schema over your data and…
Feb 2026 · hyperterse.com · its alternatives →
- 15GV
2015 · gundb.io · its alternatives →
- 16
Long-simmering side project that is finally ready to see the light. HAMTs are a cool persistent data structure and implementing one has been a lot of fun. Beyond the code, there is likely some value in the extensive and largely complete implementation docs; basic benchmarks are linked in the README, too. Kind of aiming to be "the libavl for HAMTs". That is obviously a high and aspirational bar but a distinct possibility if it stirs up a little interest and/or contribution. Anyways, it's time for this to go out, collect feedback and maybe even some use outside of toy projects. Let me…
2023 · github.com · its alternatives →
- 17
BlobCity DB▲37A blazing fast ACID compliant NoSQL DataLake with support for storing 17 formats of data. Full SQL and DML capabilities along with Java stored procedures for advanced data processing. - GitHub - blobcity/db: A blazing fast ACID compliant NoSQL DataLake with support for storing 17 formats of data. Fu
2019 · github.com · its alternatives →
- 18
An open source cybersecurity protocol for syncing decentralized graph data. - Create new page · amark/gun Wiki
2016 · github.com · its alternatives →
- 19
Hi everyone — I’m the developer of UnisonDB, an open-source log-native database built in Go for distributed and edge-scale systems. UnisonDB rethinks the boundary between databases and streaming systems. Instead of treating the Write-Ahead Log (WAL) as a recovery mechanism, it treats the log itself as the database. Every write is immediately durable, queryable, and replicable — without Kafka, CDC pipelines, or changefeed daemons. UnisonDB unifies persistence and streaming in one system. It’s designed for real-time, event-driven, and edge-first workloads where data needs to move as fast as…
Nov 2025 · github.com · its alternatives →
- 20
Hi HN, For the past few months, I’ve been building UnisonDB — a log-native database where the Write-Ahead Log (WAL) is the database, not just a recovery mechanism. I started this because every time I needed data to flow — from core to edge, or between datacenters — I ended up gluing together a KV database + CDC + Kafka. It worked, but it always felt like overkill: too many moving parts for even small workloads, and too little determinism. What is it? UnisonDB unifies storage and streaming into a single log-based core. Every write is: • Durable (appended to the WAL), • Ordered (globally…
Nov 2025 · unisondb.io · its alternatives →
- 21
A transactional key-value database written in Go for Linux and macOS - voidDB/voidDB
2025 · github.com · its alternatives →
- 22SD
Hi HN, I'm Dean, the non-technical co-founder of SchemafreeSQL. We released our beta version about a year ago. You can see the HN Post here https://news.ycombinator.com/item?id=30291592 Today I am pleased to announce our initial release of our hosted SFSQL offering. A major concern from the HN Beta feedback we received was our longevity. Being a hosted database solution I can see why. We took that to heart and re-engineered our offering. We de-risked it by minimizing the amount of infrastructure under our management, fly.io manages customer's dedicated SFSQL endpoints,…
2023 · schemafreesql.com · its alternatives →
- 23
Hi HN — we've built a testing framework for Supabase that spins up fast, isolated Postgres databases for each test case. It’s designed to make RLS policies easy to validate with real database state, without global test fixtures or mock auth. Features: - Instant isolated Postgres DBs per test - Automatic rollback after each test - RLS-native testing with `.setContext()` for auth simulation - Flexible seeding (SQL, CSV, JSON, JS) - Works with Jest, Mocha, and any async test runner - CI-friendly (runs cleanly in GitHub Actions) We also published example projects and a free set of tutorials:…
Nov 2025 · npmjs.com · its alternatives →
- 24
CursusDB is an open-source distributed in-memory yet persisted document oriented database system with real time capabilities. - GitHub - cursusdb/cursusdb: CursusDB is an open-source distributed in-memory yet persisted document oriented database system with real time capabilities.
2024 · github.com · its alternatives →
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